Plumbers in Forest Hill
Forest Hill's Edwardian houses need plumbing upgrades that address ageing heating systems while supporting modern additions like loft bathrooms and kitchen extensions. Gas Safe registered plumbers in SE23 handle boiler replacements, heating system upgrades, and bathroom plumbing across the area's family-friendly streets.
Plumbing in Forest Hill centres on upgrading the heating and hot water systems in the area's Edwardian housing stock. Many properties still run boilers installed in the 1990s or earlier, and the improvement in efficiency and reliability from a modern replacement is significant.
Boiler installations in Forest Hill are typically straightforward. Most Edwardian houses have convenient boiler locations in kitchens or utility areas, and the existing pipe runs can usually be adapted for the new system. A combi boiler suits most three- and four-bedroom properties, providing hot water on demand without the space requirements of a separate cylinder.
Central heating upgrades complement boiler replacements. New radiators sized for each room, thermostatic radiator valves, and modern controls ensure the heating system performs efficiently. Many Forest Hill homeowners add a smart thermostat at the same time, allowing remote control and intelligent scheduling.
Bathroom plumbing for loft conversions is a regular project in Forest Hill. The en-suite bathroom in a converted loft needs supply pipes, waste drainage, and a heating circuit routed from below. Adequate water pressure at the top of the house is essential — a combi boiler typically provides this, but older properties with low mains pressure may need a booster pump.
Kitchen plumbing for extensions and renovations involves positioning supply and waste connections precisely where the kitchen design requires them. The plumber works from the kitchen designer's layout to first-fix all connections before the walls are closed up. Getting this right first time avoids costly modifications later.
Underfloor heating in extensions is a popular choice in Forest Hill. The system provides comfortable, even heat without wall-mounted radiators, and works well with the tiled or engineered-wood floors common in modern kitchen-diners. Water-fed systems connected to the main boiler are more efficient than electric alternatives.
Content verified by the South London Trades editorial team — last updated March 2026
TYPICAL COSTS IN FOREST HILL
Plumbers in this area
Walmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfilePrecision Plumbers - London Emergency Drainage and Plumbing
Plumber serving Forest Hill and surrounding areas.
View ProfileHomecare London Ltd
Plumbers' merchant serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileJose Plumbing & Heating Forest Hill
Plumber serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileGlenn Williams Plumbing
Plumber serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileProflo London
Plumber serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileWalmart Supercenter
Department store serving Forest Hill and surrounding areas.
View ProfileDown The Drain Plumbers
Plumber serving Dulwich and surrounding areas.
View ProfileA combi boiler installation in SE23 costs £2,300–£3,700 depending on the brand and any repositioning needed. Worcester Bosch and Vaillant are the most popular choices in the area, offering long warranties and reliable performance. A straightforward swap takes one day; repositioning adds a second day.
Yes — underfloor heating is ideal for extensions, particularly under tiled or stone floors. Water-fed systems cost £45–£76 per square metre installed and connect to your existing boiler. They provide even heat across the floor and eliminate the need for radiators, freeing up wall space.
A loft bathroom needs hot and cold water supply pipes, waste drainage (a 110mm soil pipe for the WC and 40mm waste pipes for basin and shower), and a heating circuit for a towel radiator or underfloor heating. First-fix plumbing costs £1,050–£2,200 and should be completed before the loft is boarded and plastered.